Putter head



FIG. 1 is a perspective view of the putter head, the broken line showing of the hosel and shaft is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a perspective view;

FIG. 3 is a top plan view of FIG. 2;

FIG. 4 is a top plan view of FIG. 1;

FIG. 5 is a left side view of FIG. 1; and,

FIG. 6 is a front view of FIG. 1. 

The ornamental design for a putter head, as shown and described. 